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Expert has been active in the field of extractive metallurgy for more than 60 years. He has developed processes for the recovery of many metals including antimony, arsenic, barium, bismuth, boron, chromium, cobalt, copper, gallium, germanium, gold, lead, lithium, magnesium, manganese, molybdenum, nickel, niobium, radium, rare earths, rhenium, silver, tantalum, titanium, tungsten, uranium, vanadium, and zinc. He holds about ten patents with others pending. He has experience in roasting, smelting, leaching, solvent extraction, ion exchange, crystallization, precipitation, and electrodeposition.

Expert has been involved with process development for the gold industry for more than 50 years. He performed the laboratory work for the design of some of the first United States heap leaching operations and performed the laboratory studies that led to the first pressure oxidation facility in the United States. He also conducted laboratory programs on the roasting and cyanidation of gold ores.

Expert has helped develop a number of processes for the recovery of metals from wastes and intermediates. These include uranium from machining sludges, metals from spent catalysts, lead from soils, and mercury from soils and wastes.

Expert has performed numerous laboratory programs on the development and evaluation of soil remediation techniques. These include thermal processing, biological remediation, soil washing, and stabilization. One many of these projects, Expert provided consulting assistance during the on-site remediation.

Expert began working for the extractive uranium industry in 1960 and has participated in all areas of uranium processing. These include ore flotation, roasting, leaching, ion exchange, solvent extraction, precipitation, and crystallization. Expert had technical responsibility for the first two in-situ uranium leaching pilot plants in the United States and has performed laboratory studies or consulted for more than fifty operations.

Expert built his first solvent extraction pilot plant in 1960 and has built or operated more than 50 pilot or commercial plants since that time. Metals processed include boron, chromium, cobalt, copper, gallium, germanium, molybdenum, nickel, niobium, rare earths, tantalum, tungsten, uranium, vanadium, and zinc.

These plants have included conventioinal mixer settlers, centrifugal contactors, and packed columns for processing slurries.

Expert has been associated with vanadium processing since 1959. This experience includes participation in the development of commercial processes for the productioin of vanadium trioxide, vanadium carbide, vanadium oxychloride, and vanadium tetrachloride. He operated commercial facilities for the manufacture of vanadium oxychloride and vanadium tetrachloride.

In 1999, he participated in the start-up of a boron solvent extraction circuit in Chile. His efforts included on-site process testing and modification to permit successful chemical performance.In 1985, he participated in a thorough review of the Atlas Gold Bar gold mill. The review corrected a number of operating problems and allowed for higher recovery of gold at a lower cost.He provided on-site review of under-construction process flowsheet for processing of nickel/cadmium wastes. Numerous faults were found and not corrected by the client. The plant was not able to start-up successfully and was abandoned.He performed laboratory testing and plant pilot testing for revision of ammonium metavanadate crystallization circuit.